efi_loader: correctly determine length of empty device path
efi_dp_size() is meant to return the device path length without the end
node.
The length of a device path containing only an end node was incorrectly
reported as 4.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c
index 9b4d9ae..a2e4885 100644
--- a/lib/efi_loader/efi_device_path.c
+++ b/lib/efi_loader/efi_device_path.c
@@ -234,6 +234,8 @@
{
unsigned sz = 0;
+ if (!dp || dp->type == DEVICE_PATH_TYPE_END)
+ return 0;
while (dp) {
sz += dp->length;
dp = efi_dp_next(dp);